| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 2 |
1.4%
|
| -7 | does not apply | 2 |
1.4%
|
| 0 | no obstacle | 80 |
54.1%
|
| 1 | minor obstacle | 46 |
31.1%
|
| 2 | moderate obstacle | 12 |
8.1%
|
| 3 | major obstacle | 4 |
2.7%
|
| 4 | very severe obstacle | 2 |
1.4%
|